fatal: Authentication failed for 'https://github.com/isaaacme/smStore.git/' code example

Example: authentication failed github

Authentication failed.
You may not have permission to access the repository

Stepa to fix issue:

1.Remove repo from GitHub Desktop
2.Logout from your github account [File > Options]
3.File > Add Local Repository
4.Repository > Repository Settings and change to https URL [Important tweek]
5.It started working back for me.